JPH0745864Y2 - Electromagnetic contactor coil voltage display - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a coil voltage display device for displaying a rated voltage applied to a drive coil of an electromagnetic contactor.

[Conventional technology]

The electromagnetic contactor is generally opened and closed by applying a circuit voltage to the coil of an electromagnet device that drives the electromagnetic contactor to which the electromagnetic contactor is connected. Therefore, when assembling the electromagnetic contactor, it is necessary that the voltage applied to the coil be clear, and that this voltage be clearly visible from the outside when connected to an electric circuit. However, conventionally, as shown in FIG. 4, this coil voltage is described on the nameplate 2 attached to the case of the electromagnetic contactor.

[Problems to be solved by the device]

Since it is difficult to add display parts to conventional electromagnetic contactors due to external dimensions and cost constraints, the coil voltage was displayed on a part of the nameplate attached to the main body case.
With this configuration, there is no hindrance to the handling of the completed electromagnetic contactor, but there is a problem in management because the coil does not display the working voltage in the assembly process.

An object of the present invention is to provide a coil voltage display device for an electromagnetic contactor in which the coil voltage can be easily checked before and after assembly.

[Means for Solving the Problems]

In order to solve the above-mentioned problems, the present invention provides a case, a bobbin that is housed in the case and has a coil wound around it, a movable core that is attracted by the coil, and a movable contactor support that is driven by the movable core. A coil voltage display device for an electromagnetic contactor, comprising: applying a voltage to the coil to attract the movable iron core to drive the movable contact support, wherein the coil is configured to contact a flange of the bobbin parallel to the side wall of the case. It is characterized in that a display plate indicating a voltage is provided, a window having four sides slightly smaller than the display plate is provided on a side wall of the case with which the display plate comes into contact, and ribs are provided on the outer periphery of the window.

[Action]

Since the coil voltage is displayed on the display board of the coil bobbin, this can be confirmed even during the assembly process, and after assembly, the coil voltage displayed relatively large can be confirmed from the outside of the case through the window. . Furthermore, the window is covered with this display plate to prevent dust from entering. Further, the ribs around the window also have a function of preventing dust or the like from entering through the window.

〔Example〕

1 to 3 show an embodiment of a coil voltage display device for an electromagnetic contactor according to the present invention. In the electromagnetic contactor shown in FIG. 1, a fixed iron core 3 is installed on the bottom of a case 1 as shown in FIG. 3, and a coil 5 wound around a bobbin 4 is inserted in the center leg thereof. The movable iron core 6 attracted by the fixed iron core 3 has a prism 7 mounted at a right angle to the movable iron core 6 supported on both side walls of the case 1 and is rotatable about this. Reference numeral 8 denotes an insulating plate for partitioning the movable contactor support 9 side and the movable iron core 6 side. The movable contactor support 9 driven by the movable iron core 6 is attached with a movable contact 10, a contact spring 11 and the like. The movable spring core 6 is released from the fixed core core 3 by the return spring 12. Reference numeral 14 is a wall provided on the bobbin 4, and the movable iron core 6 is sucked and released by the fixed iron core 3 between the both walls 14-14. In addition, the movable iron core 6 is formed on both walls 14
It is surrounded by -14 and the insulating plate 8 to be protected from dust.

As shown in FIG. 2, the bobbin 4 around which the coil 5 of the electromagnetic contactor is wound is provided with a display plate 13 that comes into contact with the side wall of the case 1 in parallel when the bobbin 4 is housed in the case 1. The rated voltage to be applied to the coil 5 is displayed on the display plate 13. As shown in FIG. 1, the case 1 for accommodating the coil 4 is provided with a window 15 on the side wall of the case 1 with which the display plate 13 abuts.
Ribs 16 are provided around the outside of 15. Since the case 1 and the bobbin 4 are formed of a thermoplastic resin, the elasticity of the bobbin 4 presses the bobbin 4 into the case 1 so that the periphery of the display plate 13 and the case 1 are in close contact with each other to prevent dust from entering. it can. Furthermore, the ribs 16 around the window 15 can prevent intrusion of dust and the like that fall after the electromagnetic contactor is mounted on a distribution board or the like. The case 1 is often divided into upper and lower parts, and the electromagnetic contactor shown in FIG. 1 is also configured in this way. However, when the window 15 extends over the upper and lower cases, the side wall provided with the window is extended upward. It should be combined with the upper case.

The coil voltage displayed on the display plate 13 can be visually observed even in the assembly process before the coil is assembled into the case 1.
Even after being assembled in, it can be easily viewed through the window 15 of the case 1.

[Effect of device]

According to the present invention, the coil is provided with the voltage display plate and the voltage applied to the coil is displayed, so that the coil voltage can be always checked in the assembly process and no mistake is made. Further, after assembled, there is an effect that it is possible to confirm the voltage display on the relatively large display board and mount it on site. Further, by forming ribs on the periphery of the window provided in the case, it is possible to prevent dust from entering.

[Brief description of drawings]

1 to 3 show an embodiment of a coil voltage display device for an electromagnetic contactor according to the present invention, FIG. 1 is a perspective view showing the appearance of the electromagnetic contactor, and FIG. 2 is a perspective view showing a coil and a bobbin. FIG. 3 is a front sectional view of an electromagnetic contactor, and FIG. 4 is a perspective view showing the appearance of a conventional electromagnetic contactor. 1: case, 4: bobbin, 5: coil, 6: movable iron core, 9: movable contact support, 13: display plate, 15: window, 16: rib.

Claims (1)

[Scope of utility model registration request] 1. A case, a bobbin housed in the case and around which a coil is wound, a movable iron core attracted to the coil, and a movable contactor support driven by the movable iron core. Is a coil voltage display device of an electromagnetic contactor for applying a voltage to attract the movable iron core to drive the movable contact support, wherein the display plate indicates the coil voltage by abutting the flange of the bobbin in parallel with the side wall of the case. A coil voltage display device for an electromagnetic contactor, characterized in that a window having four sides slightly smaller than the display plate is provided on the side wall of the case with which the display plate abuts, and ribs are provided on the outer periphery of the window.